<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 提示 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 进度条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs区域 -->
      <el-form
        :model="addFrom"
        :rules="addFromRules"
        ref="addFromRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addFrom.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addFrom.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addFrom.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addFrom.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expand-Trigger="hover"
                v-model="addFrom.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item 项 -->
            <el-form-item
              :key="item.attr_id"
              v-for="item in manyTableData"
              :label="item.attr_name"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                  <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
              <!-- action 表示图片上传的接口地址 -->
              <!-- 需要配置headers请求头 -->
              <el-upload
               :action="uploadURL"
               :on-preview="handlePreview"
               :on-remove="handleRemove"
               list-type="picture" :headers="headerObj" :on-success="handleSuccess">
               <el-button size="small" type="primary">点击上传</el-button>
             </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
              <!-- 富文本编辑器 -->
              <quill-editor v-model="addFrom.goods_introduce"></quill-editor>
              <!-- 添加商品的按钮 -->
              <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览的对话框 -->
  <el-dialog
  title="预览效果"
  :visible.sync="previewVisible"
  width="30%">
  <img :src="previewPath" class="previewImg">
  <span slot="footer" class="dialog-footer">
  </span>
</el-dialog>
  </div>

  
</template>

<script>
import _ from "lodash"
export default {
  data() {
    return {
      // 默认激活项
      activeIndex: "0",
      // 添加表单对象
      addFrom: {
        goods_name: "",
        goods_price: "",
        goods_weight: "",
        goods_number: "",
        // 商品所属分类数组
        goods_cat: [],
        // 图片的数组
        pics:[],
        // 商品的详情描述
        goods_introduce:'',
        // 
        attrs:[],
      },
      // 表单的验证规则
      addFromRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
      },
      // 保存分类数据
      cateList: [],
      // 级联选择框的配置对象
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
        expandTrigger: "hover",
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData:[],
      // 上传图片的url地址
      uploadURL:'http://106.54.194.45:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头
      headerObj:{
          Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览的路径
      previewPath:'',
      // 控制预览对话快的显示和颖仓
      previewVisible:false,

    };
  },
  created() {
    this.getCateList();
  },
  mounted() {},
  methods: {
    // 获取所有的商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败");
      }
      this.$message.success("获取商品分类数据成功");
      console.log(res.data);
      this.cateList = res.data;
    },
    // 级联选择器选中项变化，会触发这个函数
    handleChange() {
      console.log(this.addFrom.goods_cat);
      // 判断goods_cat的长度
      if (this.addFrom.goods_cat.length !== 3) {
        this.addFrom.goods_cat = [];
      }
    },
    // 阻止进行下一步基本
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addFrom.goods_cat.length !== 3) {
        this.$message.error("请选择商品分类！");
        return false;
      }
    },
    // 动态参数面板
    async tabClicked() {
      // 证明访问的是动态参数面板
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" },
          }
        );

        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        console.log(res.data);
        res.data.forEach((item) => {
          // 将 item.attr_vals 转化成数组
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });

        this.manyTableData = res.data;
      } else if(this.activeIndex === "2"){
          const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );

        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        console.log(res.data);
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览
    handlePreview(file) {
        console.log(file);
        // this.previewPath = file.response.data.url
        this.previewPath = file.url
        this.previewVisible = true
    },
    // 处理一处图片的操作
    handleRemove(file) {
        console.log(file);
        // 1.获取将要删除的图片的临时路径
        const filePath = file.response.data.tmp_path
        // 2. 从pics 数组中，找到这个图片对应的索引值
        const i = this.addFrom.pics.findIndex(x => x.pic=== filePath)
        // 3.调用数组的splice方法，把图片信息对象，从pics数组中移除
        this.addFrom.pics.splice(i,1)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
        // 上传成功的数据
        console.log(response);
        // 1.拼接得到一个图片信息对象
        const picInfo = {pic:response.data.tmp_path}
        // 2. 将图片信息对象，push到pics 数组中
        this.addFrom.pics.push(picInfo)
        console.log(this.addFrom);
    },
    // 点击添加按钮添加商品
    add() {
        // console.log(this.addFrom);
        this.$refs.addFromRef.validate(async valid => {
            if(!valid) {
                return this.$message.error('请填写必要的表单项！')
            }
            // 执行添加的业务逻辑
            // lodash cloneDeep(obj)
            const form = _.cloneDeep(this.addFrom)
            form.goods_cat = form.goods_cat.join(',')
            // 处理动态参数 处理静态属性
            this.manyTableData.forEach(item => {
                const newInfo = {
                    attr_id:item.attr_id,
                    // 将attr_vals 转化为字符串
                    attr_value:item.attr_vals.join(' ')
                }
                this.addFrom.attrs.push(newInfo)
            })
            // 处理静态属性
            this.onlyTableData.forEach(item => {
                const newInfo = {
                    attr_id:item.attr_id,
                    attr_value:item.attr_vals
                }
                this.addFrom.attrs.push(newInfo)
            })
            form.attrs = this.addFrom.attrs
            console.log(form);


            // 发起请求添加商品
            // 商品的名称必须是唯一的
            const {data:res} = await this.$http.post('goods',form)
            if(res.meta.status !== 201) {
                return this.$message.error('添加商品失败')
            }
            this.$message.success('添加商品成功')
            this.$router.push('/goods')
        })
    }
  },
  // 计算属性
  computed: {
    cateId() {
      if (this.addFrom.goods_cat.length === 3) {
        return this.addFrom.goods_cat[2];
      }
      return;
    },
  },
};
</script>

<style scoped lang="less">
.el-checkbox {
    margin-right: 10px;
}
.previewImg {
    width: 100%;
}
.btnAdd {
    margin-top: 15px;
}
</style>
